Effects of atmospheric gas composition and temperature on the gasification of coal in hot briquetting carbon composite iron ore

Yasuaki Ueki, Masao Kanayama, Takayuki Maeda, Koki Nishioka, Masakata Shimizu

Research output: Contribution to journalArticle

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Abstract

The gasification behavior of carbon composite iron ore produced by hot briquetting process was examined under various gas atmospheres such as CO-N 2, CO2-N2 and CO-CO2 at various temperatures. The gasification of coal was affected strongly by atmospheric gas concentration and reaction temperature. Kinetic analysis in various gas atmospheres was carried out by using the first order reaction model, which yields the straight line relation between reaction rate constants for the gasification of coal and the gas concentration. Therefore, reaction rate constants for the gasification of coal in CO-CO2-N2 gas atmosphere were written as follows; kc1=a×kc1(CO) +b×kc1(CO2)+c×kc1(N2) kc2=a×kc2(CO)+b×kc2(CO 2)+c×kc2(N2) a=CCO/(C CO+CCO2+CN2), b=CCO2/(C CO+CCO2+CN2), c=CN2/(C CO+CCO2+CN2) where, kC1 and k C2 are the gasification rate constant of the first half(1/s) and the latter half(1/s) respectively, kC1(CO), kC1(CO 2) and kC1(N2) are kC1 in 100% CO gas atmosphere (1/s), 100% CO2 gas atmosphere (1/s) and 100% N 2 gas atmosphere (1/s) respectively, kC2(CO), k C2(CO2) and kC2(N2) are k C2 in 100% CO gas atmosphere (1/s), 100% CO2 gas atmosphere (1/s) and 100% N2 gas atmosphere (1/s) respectively, CCO, CCO2 and CN2 are the concentration of CO gas (vol%), CO2 gas (vol%) and N2 gas (vol%) respectively.

Original languageEnglish
Pages (from-to)18-22
Number of pages5
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume93
Issue number1
DOIs
Publication statusPublished - Jan 1 2007

Fingerprint

Briquetting
atmospheric composition
iron ores
atmospheric temperature
gasification
Coal
Iron ores
gas composition
Carbon Monoxide
gas temperature
Gasification
coal
Carbon
Gases
composite materials
carbon
Composite materials
Chemical analysis
gases
atmospheres

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Cite this

Effects of atmospheric gas composition and temperature on the gasification of coal in hot briquetting carbon composite iron ore. / Ueki, Yasuaki; Kanayama, Masao; Maeda, Takayuki; Nishioka, Koki; Shimizu, Masakata.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 93, No. 1, 01.01.2007, p. 18-22.

Research output: Contribution to journalArticle

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abstract = "The gasification behavior of carbon composite iron ore produced by hot briquetting process was examined under various gas atmospheres such as CO-N 2, CO2-N2 and CO-CO2 at various temperatures. The gasification of coal was affected strongly by atmospheric gas concentration and reaction temperature. Kinetic analysis in various gas atmospheres was carried out by using the first order reaction model, which yields the straight line relation between reaction rate constants for the gasification of coal and the gas concentration. Therefore, reaction rate constants for the gasification of coal in CO-CO2-N2 gas atmosphere were written as follows; kc1=a×kc1(CO) +b×kc1(CO2)+c×kc1(N2) kc2=a×kc2(CO)+b×kc2(CO 2)+c×kc2(N2) a=CCO/(C CO+CCO2+CN2), b=CCO2/(C CO+CCO2+CN2), c=CN2/(C CO+CCO2+CN2) where, kC1 and k C2 are the gasification rate constant of the first half(1/s) and the latter half(1/s) respectively, kC1(CO), kC1(CO 2) and kC1(N2) are kC1 in 100{\%} CO gas atmosphere (1/s), 100{\%} CO2 gas atmosphere (1/s) and 100{\%} N 2 gas atmosphere (1/s) respectively, kC2(CO), k C2(CO2) and kC2(N2) are k C2 in 100{\%} CO gas atmosphere (1/s), 100{\%} CO2 gas atmosphere (1/s) and 100{\%} N2 gas atmosphere (1/s) respectively, CCO, CCO2 and CN2 are the concentration of CO gas (vol{\%}), CO2 gas (vol{\%}) and N2 gas (vol{\%}) respectively.",
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AU - Ueki, Yasuaki

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AU - Shimizu, Masakata

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N2 - The gasification behavior of carbon composite iron ore produced by hot briquetting process was examined under various gas atmospheres such as CO-N 2, CO2-N2 and CO-CO2 at various temperatures. The gasification of coal was affected strongly by atmospheric gas concentration and reaction temperature. Kinetic analysis in various gas atmospheres was carried out by using the first order reaction model, which yields the straight line relation between reaction rate constants for the gasification of coal and the gas concentration. Therefore, reaction rate constants for the gasification of coal in CO-CO2-N2 gas atmosphere were written as follows; kc1=a×kc1(CO) +b×kc1(CO2)+c×kc1(N2) kc2=a×kc2(CO)+b×kc2(CO 2)+c×kc2(N2) a=CCO/(C CO+CCO2+CN2), b=CCO2/(C CO+CCO2+CN2), c=CN2/(C CO+CCO2+CN2) where, kC1 and k C2 are the gasification rate constant of the first half(1/s) and the latter half(1/s) respectively, kC1(CO), kC1(CO 2) and kC1(N2) are kC1 in 100% CO gas atmosphere (1/s), 100% CO2 gas atmosphere (1/s) and 100% N 2 gas atmosphere (1/s) respectively, kC2(CO), k C2(CO2) and kC2(N2) are k C2 in 100% CO gas atmosphere (1/s), 100% CO2 gas atmosphere (1/s) and 100% N2 gas atmosphere (1/s) respectively, CCO, CCO2 and CN2 are the concentration of CO gas (vol%), CO2 gas (vol%) and N2 gas (vol%) respectively.

AB - The gasification behavior of carbon composite iron ore produced by hot briquetting process was examined under various gas atmospheres such as CO-N 2, CO2-N2 and CO-CO2 at various temperatures. The gasification of coal was affected strongly by atmospheric gas concentration and reaction temperature. Kinetic analysis in various gas atmospheres was carried out by using the first order reaction model, which yields the straight line relation between reaction rate constants for the gasification of coal and the gas concentration. Therefore, reaction rate constants for the gasification of coal in CO-CO2-N2 gas atmosphere were written as follows; kc1=a×kc1(CO) +b×kc1(CO2)+c×kc1(N2) kc2=a×kc2(CO)+b×kc2(CO 2)+c×kc2(N2) a=CCO/(C CO+CCO2+CN2), b=CCO2/(C CO+CCO2+CN2), c=CN2/(C CO+CCO2+CN2) where, kC1 and k C2 are the gasification rate constant of the first half(1/s) and the latter half(1/s) respectively, kC1(CO), kC1(CO 2) and kC1(N2) are kC1 in 100% CO gas atmosphere (1/s), 100% CO2 gas atmosphere (1/s) and 100% N 2 gas atmosphere (1/s) respectively, kC2(CO), k C2(CO2) and kC2(N2) are k C2 in 100% CO gas atmosphere (1/s), 100% CO2 gas atmosphere (1/s) and 100% N2 gas atmosphere (1/s) respectively, CCO, CCO2 and CN2 are the concentration of CO gas (vol%), CO2 gas (vol%) and N2 gas (vol%) respectively.

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